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Home > Products > Valves > Diaphragm-Sealed Valves > High-Purity High-Pressure Diaphragm Valves up to 3500 psig (241 bar)
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High-Purity High-Pressure Diaphragm-Sealed Valves up to 3500 psig (241 bar)

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Diaphragm-Sealed Valves—DL Series and DS Series

Diaphragm Valves DL Series and DS Series

Swagelok® DL series and DS series diaphragm valves offer packless, all metal containment for high-purity and ultrahigh-purity applications up to 3500 psig.


Specifications

Working Pressure
Temperature
Flow Coefficient
Body Material
Diaphragm Material
End Connections
• Type



• Size


Up to 3500 psig (241 bar)
–100 to 250°F (–73 to 121°C)
Up to 0.30
316L stainless steel
316 stainless steel

Swagelok tube fitting, VCR® face seal fitting, VCO® O-ring fitting, tube butt weld, tube socket weld
1/4, 3/8, and 1/2 in.; 6 and 8 mm
DL Series and DS Series Diaphragm Valves Cutaway

Features

  • Repetitive shutoff with fully contained soft-seat stem tip
  • Bottom mounting and panel mounting standard
  • DL series (lever handle)
    • Quarter-turn actuation
    • Position indicator ring
    • Splined handle and actuator prevents slippage
  • DS series (rotary handle)
    • Approximately one and one-half turns to operate from fully open to closed.

Process Specifications

  • Standard, no process designator: Special Cleaning and Packaging (SC-11)
    • Special cleaning with non–ozone-depleting chemicals
    • Performed in specially cleaned areas; valves are individually bagged
    • 20 µin. (0.51 µm) average, machine finished.
  • Ultrahigh-purity, process designator P: Ultrahigh-Purity Process Specification (SC-01)
    • Ultrahigh-purity cleaning with a continuously monitored, deionized water, ultrasonic cleaning system
    • Performed in ISO Class 4 work areas; valves are double bagged and vacuum sealed in cleanroom bags
    • 8 µin. (0.20 µm) average, machine finished and electropolished.

Testing

Inboard helium leak tested to a rate of 4 × 10–9 std cm3/s at the seat, envelope, and all seals.


Multiport and Elbow Diaphragm Valves and Multivalve Manifolds

DL and DS series diaphragm valves are available in multiport and elbow configurations; see the Swagelok Bellows- and Diaphragm-Sealed Multiport and Elbow Valves Selection Guide. Multivalve manifolds are also available; contact your authorized Swagelok sales and service representative.


Options

  • PCTFE stem tip is standard; PTFE and polyimide material are available.
  • Stem replacement and diaphragm seal kits are available.
  • Green handles are standard; a variety of other colors are available.
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